Curtain



FIG. 1 is a front elevational view of a curtain with the valance for the curtain overlying the top of the curtain;

FIG. 2 is a front elevational view of the curtain with the valance in a raised position to further clarify the design; and,

FIG. 3 is a rear elevational view of the curtain with the valance raised. 

The ornamental design for a curtain, as shown and described. 